ARM holdings confirms iPhone chips

I have a question. Late last year, a patent was found that showed Apple was looking into making a single device with two batteries; one for a music player, and one for a phone. Do we know yet whether the iPhone will have the two batteries? Do we know how the battery life will be on the iPhone?
Thanks. ~Tim

It's not exactly a confirmation -- here's the quote from the original source (Warren East, CEO of ARM):

"ARM is in 90 percent of the world's [mobile phone] handsets; we're in WiFi, baseband processors and applications processors and most of the world's MP3 players. So it's at least three,"

Sounds more like a summary based on the iPhone's features than a real confirmation to me. About the main processor, the article just says:

"Further to an "email to the editor" which estimated that there may be three ARM processor cores in the Apple iPhone, reports came forward that the main CPU for the iPhone is a PXA320"

...which isn't much detail or even conclusive ("reports came forward", meh).

So..OS X runs on ARM as well ? Cool..